Note that this ​came up today in #editor during a Gutenberg bug scrub. Any chance of looking back into having Slack mentions of Issues (and maybe even PRs) automatically referenced in the respective GitHub Issue (or PR) to ensure all conversation is appropriately captured in GitHub?

@ocean90 I'm guessing the maybelater is due to the fact that Slack references included in Trac tickets does NOT generate a Trac email notification? I'd counter that it may not be a horrible thing if GitHub generates an email notification for Slack references. Though I can see why people would want to mimic the same functionality as the Trac integration.